Optical constants of Tb3Ga5O12 (Terbium gallium garnet, TGG)
Franta et al. 2025: n,k 0.120–400 µm
Complex refractive index (n+ik)
Derived optical constants
Comments
Single-crystal Tb3Ga5O12; Heterogenous data processing combining ellipsometric and spectrophotometric measurements with refractive index data (Schlarb et al. 1994); 5, 3, and 0.5 mm thick plates; Room temperature.
References
D. Franta, M.-G. Mureșan, P. Ondračka, B. Hroncová, F. Vižďa. Wide spectral range optical characterization of terbium gallium garnet (TGG) single crystal by universal dispersion model, Opt. Laser Technol. 181, 111916 (2025) (Numerical data kindly provided by Daniel Franta)
Data
Additional information
About Terbium gallium garnet
Terbium gallium garnet (Tb3Ga5O12, TGG) is a magneto-optical crystal that exhibits excellent transparency in the visible and near-infrared regions. Its high Verdet constant makes it a prime material for use in Faraday rotators and optical isolators, key components in lasers and other optical systems that require the prevention of back-reflected light. TGG is known for its low absorption loss and high thermal conductivity, making it ideal for high-power laser applications. These properties, combined with its mechanical stability, ensure its performance in demanding environments such as laser systems used in industrial, medical, and research applications.
Other names and variations:- Tb3Ga5O12
- TGG
- Terbium gallate garnet
- Magneto-optical garnet